derek.holloway
7502bf64a4
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75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
/*
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* Copyright 2008-2013 NVIDIA Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <thrust/detail/config.h>
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#include <thrust/advance.h>
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#include <thrust/system/detail/generic/advance.h>
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#include <thrust/iterator/iterator_traits.h>
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#include <thrust/detail/type_traits.h>
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#include <thrust/detail/type_traits/has_nested_type.h>
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#include <thrust/detail/type_traits/pointer_traits.h>
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THRUST_NAMESPACE_BEGIN
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__THRUST_DEFINE_HAS_NESTED_TYPE(has_difference_type, difference_type)
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template <typename InputIterator, typename Distance>
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THRUST_HOST_DEVICE
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void advance(InputIterator& i, Distance n)
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{
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thrust::system::detail::generic::advance(i, n);
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}
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template <typename InputIterator>
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THRUST_HOST_DEVICE
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InputIterator next(
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InputIterator i
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, typename iterator_traits<InputIterator>::difference_type n = 1
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)
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{
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thrust::system::detail::generic::advance(i, n);
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return i;
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}
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template <typename BidirectionalIterator>
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THRUST_HOST_DEVICE
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BidirectionalIterator prev(
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BidirectionalIterator i
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, typename iterator_traits<BidirectionalIterator>::difference_type n = 1
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)
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{
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thrust::system::detail::generic::advance(i, -n);
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return i;
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}
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template <typename BidirectionalIterator>
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THRUST_HOST_DEVICE
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typename detail::disable_if<
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has_difference_type<iterator_traits<BidirectionalIterator> >::value
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, BidirectionalIterator
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>::type prev(
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BidirectionalIterator i
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, typename detail::pointer_traits<BidirectionalIterator>::difference_type n = 1
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)
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{
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thrust::system::detail::generic::advance(i, -n);
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return i;
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}
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THRUST_NAMESPACE_END
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